Research Article
Finite Element Analysis of Natural Thawing Heat Transfer of Artificial Frozen Soil in Shield-Driven Tunnelling
Table 3
Thermal physical parameters for different soil layers.
| Soil layers | Thermal conductivity (W/(m·°C)) | Specific heat capacity (J/(kg·°C)) | Latent heat (×108 J/m3) | Unfrozen soil | Frozen soil | Unfrozen soil | Frozen soil |
| Filled soil | 1.34 | 2.12 | 1506 | 1250 | 0.97 | Silty clay | 1.35 | 2.22 | 1547 | 1330 | 0.78 | Mucky silty clay | 1.06 | 2.10 | 1717 | 1321 | 1.27 | Silty sand | 1.87 | 2.50 | 1473 | 1083 | 1.23 |
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